General Motors has a reason to preen over the results of the Michigan State Police vehicle evaluations. The Chevrolet Caprice PPV managed to eclipse its competition in top speed and braking tests. The Caprice PPV managed to scoot down from 60 miles per hour in just 125.8 feet, which is a full four feet shorter than the equivalent Ford Interceptor Sedan. Likewise, with a top speed of 154 mph, the protect-and-serve Bowtie boasts a top speed that's 6 mph faster than the 148-mph Interceptor. While t